Maths doubt

[Ameena Eesa]

how to find the median?

 

[Ameena Eesa]

how .............?

 

[saif mahmoud]

View attachment 41112 The d part...........

i knew it for this question u find the inverse of the f(x) which will be x-3/2
then substitute 5 in the place of x it will be 5-3 /2 then 2/2 = 1
then substitute 1 into the normal f(x) so 2(1) + 3
2+3
=5
got it

 

[saif mahmoud]

View attachment 41135

Solve this n show

see in indices when the bases are the same the ans will be like this
the bas will be the same and u add the power as it is multiplication if division u minus the power
now this one will be p= 3/8 and u will ad the power so it will be 3/8 +1/8 = 1/2 so q= 1/2

 

[Ameena Eesa]

i knew it for this question u find the inverse of the f(x) which will be x-3/2
then substitute 5 in the place of x it will be 5-3 /2 then 2/2 = 1
then substitute 1 into the normal f(x) so 2(1) + 3
2+3
=5
got it

how did you get x-3/2

isnt it 2x+3, so its inverse should be 1/2x+3 right?

 

[saif mahmoud]

View attachment 41136




how to find the median?

to find the median u use the formula n+1 /2 if an odd no (n = total ) if even n/2
126/2 =63
so median is 2 iguess not sure tho tell mee which year is this ques

 

[saif mahmoud]

how did you get x-3/2

isnt it 2x+3, so its inverse should be 1/2x+3 right?

nope

 

[Ameena Eesa]

to find the median u use the formula n+1 /2 if an odd no (n = total ) if even n/2
126/2 =63
so median is 2 iguess not sure tho tell mee which year is this ques

right, you brilliant at math

 

[saif mahmoud]

u replace f(x) with y and make x the subject of the formula

 

[saif mahmoud]

View attachment 41137


how .............?

which year is this question

 

[Ameena Eesa]

which year is this question

'12 Variant 21

 

[saif mahmoud]

june or nov

 

[Ameena Eesa]

june or nov

oct nov

 

[saif mahmoud]

right, you brilliant at math

Thanks

 

[Thought blocker]

View attachment 41137


how .............?

Is answer 10 ?

 

[Ameena Eesa]

Is answer 10 ?

yeahhhhh.......how did u get that?

 

[Awesome12]

yeahhhhh.......how did u get that?

If they intersect at the x-axis that means their y-intercept is equal to 0
Solve for x
For the first one, x = -4
For the second one x = 6
Thus the distance between them is 10

 

[Thought blocker]

yeahhhhh.......how did u get that?

We have, y = zero in both of the equations. So,
In line y = 2x + 8; put y as zero, you get point as (-4, zero)
Same,
In line y = 2x - 12; put y as zero, you get point as (6, zero)

Now use distance formula, Whole root of (((6 - (-4))^(2) + (0-0)^(2) = root of 100 which is 10

 

[saif mahmoud]

We have, y = zero in both of the equations. So,
In line y = 2x + 8; put y as zero, you get point as (-4, zero)
Same,
In line y = 2x - 12; put y as zero, you get point as (6, zero)

Now use distance formula, Whole root of (((6 - (-4))^(2) + (0-0)^(2) = root of 100 which is 10

exactly what i was gonna write
Great Work !!

 

[shashank gadia]

View attachment 41088 How to solve?.....................

4050*100*100*100=4050000000CM^3
4050000000/1200=3375000
3375000^(1/3)=150
ans = 1:150